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Physics Question....

10 Posts | Latest reply on 29/12/2013 03:35:48 by Deleted User | Go to original / last post

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Deleted Member

In: NA
Posts: 0

If I placed an ordinary slice of bread in the bottom of a vaccum sealed 12" glass cube .. and placed it in direct sunlight , would my slice of bread curl up and dry ?

This kept me awake for ages the other night ...

Message posted by Deleted Member on 08 December 2013 at 11:12

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Deleted Member @ 08/12/2013 11:12:51

Deleted Member

In: NA
Posts: 0

I would say yes it would, the bread would still contain moisture and as a result of exposure to sunlight, the moisture would be released, resulting in the bread curling up due to shrinkage. The moisture would condense on the sides of the glass cube.

Just changed my name to 66 Einstein.

(ooh my brain hurts now)

Message posted by Deleted Member on 08 December 2013 at 11:22

Deleted Member @ 08/12/2013 11:22:48

Eiron

In: Hastings
Posts: 173

Is there a vacuum in the cube? keep pumping with your Mityvac
and the bread will dry completely but not curl up,
and look OK for many years.

Message posted by Eiron on 15 December 2013 at 11:33

Eiron @ 15/12/2013 11:33:03

Deleted Member

In: NA
Posts: 0

It is indeed a complete vacuum inside the box....

Message posted by Deleted Member on 16 December 2013 at 17:11

Deleted Member @ 16/12/2013 17:11:51

VFR800AJ

In: Sutton Coldfield
Posts: 5668

This reminds me of that age old question........... What would happen if an unstoppable force met an immoveable object ? Answers on a posttcard............

Message posted by VFR800AJ on 23 December 2013 at 12:52

VFR800AJ @ 23/12/2013 12:52:19

Deleted Member

In: NA
Posts: 0

Ok here's another

two jam jars of flies (same number in each) with lids on.

question....if one lot are settled ( not flying) and the other are all flying inside which jar weighs the most ??

Message posted by Deleted Member on 24 December 2013 at 18:02

Deleted Member @ 24/12/2013 18:02:35

Eiron

In: Hastings
Posts: 173

One for the chemists and mathemagicians.
If you always fill your petrol tank when there's 10% left, how long before there's none of the original fuel left in the tank?

Message posted by Eiron on 25 December 2013 at 12:42

Eiron @ 25/12/2013 12:42:23

VFR800AJ

In: Sutton Coldfield
Posts: 5668

@Eiron..... I put 17 quids worth of petrol in my Diesel Mondeo Estate. realised my error and put 45 quids worth of diesel on top.......ran like a dream. No idea when i had ONLY diesel left though.

Probably wouldnt have worked if my Car had been a petrol one.

Message posted by VFR800AJ on 27 December 2013 at 00:26

VFR800AJ @ 27/12/2013 00:26:09

Deleted Member

In: NA
Posts: 0

AJ, in the days when trucks didn't have fuel heaters, we used to put a couple of pints of petrol in the diesel to prevent it from freezing in extreme cold weather conditions, had no adverse effects as petrol is a more refined product. However, deisel being less refined and needing to be put under pressure before ignition can occur would most certainly have ruined your day with the outcome in a petrol car.

Message posted by Deleted Member on 29 December 2013 at 00:22

Deleted Member @ 29/12/2013 00:22:59

Deleted Member

In: NA
Posts: 0

two jam jars of flies (same number in each) with lids on.
question....if one lot are settled ( not flying) and the other are all flying inside which jar weighs the most ??

what ever is inside the jars they should weigh the same.....

Message posted by Deleted Member on 29 December 2013 at 03:35

Deleted Member @ 29/12/2013 03:35:48

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